PHP Summary

If you've worked through every lesson, here's what you can now do — and where to go next.

You can

• Read and write modern PHP — typed properties, match, enums, readonly, named arguments.
• Use the standard library: arrays, strings, regex, dates, JSON, exceptions.
• Build classes, inherit, implement interfaces, mix in traits, organise with namespaces.
• Handle forms — validate, sanitise, redirect-after-POST.
• Talk to MySQL with PDO — connect, query, prepare, transact.
• Manage cookies and sessions safely.
• Install dependencies with Composer and autoload your code.

Where to go next

One last habit

Whenever you finish a PHP file ask three questions:

1. Are types declared on every function signature and property?
2. Is every user input bound (not concatenated) into SQL and escaped on output?
3. Could a smaller, named function replace a tangle of inline logic?

Example

<?php
// You can now: write classes, handle forms, talk to MySQL with PDO,
// validate input, manage sessions, emit JSON.
// Next: a framework (Laravel, Symfony), tests with PHPUnit, async with Swoole.
echo 'Time to build something real.';

Exercise

Test yourself